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Avoid empty byte array allocations in Proto Lite toByteArray().

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In AbstractMessageLite.toByteArray(), check if getSerializedSize() == 0 and return Internal.EMPTY_BYTE_ARRAY directly instead of allocating a new 0-byte array and CodedOutputStream wrappers.

PiperOrigin-RevId: 970010400
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Protobuf Team Bot 2026-08-24 12:32:35 -07:00 • committed by Copybara-Service
parent 672eda6f1f
commit dee117a787
1 changed files with 5 additions and 1 deletions
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6
java/core/src/main/java/com/google/protobuf/AbstractMessageLite.java
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@ -52,7 +52,11 @@ public abstract class AbstractMessageLite<
@Override
public byte[] toByteArray() {
try {
final byte[] result = new byte[getSerializedSize()];
final int size = getSerializedSize();
if (size == 0) {
return Internal.EMPTY_BYTE_ARRAY;
}
final byte[] result = new byte[size];
final CodedOutputStream output = CodedOutputStream.newInstance(result);
writeTo(output);
output.checkNoSpaceLeft();